Revealing mistake: During the close-ups of Wiley when he's in the body and leg casts, it's quite obvious that both of his hands are made out of plastic.
Grown Ups (2010)
1 revealing mistake - chronological order
Directed by: Dennis Dugan
Starring: Adam Sandler, Salma Hayek, Chris Rock, Maria Bello, Kevin James, Rob Schneider, David Spade, Maya Rudolph
Genres: Comedy
Continuity mistake: In the scene at the water park, the ladies are looking at the Canadian. In the background there is a yellow towel on a chair. But between the shots, it changes to a blue towel and then back to a yellow.
Lenny Feder: We needed to be here. Our kids were turning into little brats.
Answer: Yes. It shows his age and another portion of his life that he's covering up. He makes mention of his toupee later in the film.